Circuit parameter calculations and EM scaling fixes #238
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Two mods: 1) scale source current by 0.5, so that the input current density corresponds to the current density amplitude (rather than 2 x amplitude). 2) scale the Joule heating by 2.0, correcting a bug. These changes do not affect any previous results run at fixed power, since all they do is scale things, and the modified scale factors can be absorbed into the power scaling factor. However, they make the results more easily interpretable because they more directly correspond to quantities in an actual system (e.g., the peak current in the torch or the measured plasma power). Any results generated with fixed current will have to be updated, but increasing the current amplitude by a factor of sqrt(2) should lead to identical results.
Currently only implemented in axisymmetric EM. Add option to use this info, coupled with the Joule heating to evaluate the effective plasma resistance, which is necessary to couple to the circuit model.
Axisymmetric only for the moment. Useful for computing the effective inductance of the plasma, which is necessary to couple to the circuit model.
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This PR includes capabilities to evaluate some bulk plamsa properties that will interface with a circuit model (e.g., the plasma resistance). While implementing these, some multiplicative factor bugs were fixed in the frequency domain solver. These fixes do not impact any previous plasma simulations where the power is controlled but will affect simulations where the current is controlled.